Carburetor



Patented Aug. 2 0, 1929.

UNITED STATES MOYLE SPENCER SKAE'R, OF PITTSBURG, KANSAS.

CARBURETOR.

Application filed March 5, 1928. Serial No. 259,205.

The invention relates to improvements in carburetor-s designed primarily for use with internal combustion engines, and it is the principal object of such invention to provide a new and improved carburetor construction which will effectively heat not only the air passing therethrough, but the fuel vapor drawn from the usual spray nozzle, thus insuring much more thorough vaporizing of the fuel, particularly in cold weather.

A further object of the invention is to pro viderotatable means operated by the suction through the carburetor, for throwing the fuel vapor outwardly by centrifugal force, against a heated part of the carburetor casing, thus insuring such contact between vapor and heated surface, as to effectively raise the temperature and readily vaporize the particles of fuel.

Yet another object is to make novel provision whereby some of the air passing through the carburetor is conducted inside of a heated tube around the fuel nozzle, while additional air passes around the exterior of the heating means, thus obtaining a dual heating function from such means.

With the foregoing and minor objects in View, the invention resides in the novel subject matter hereinafter described and claimed, the description being supplemented by theaccompanying drawing.

Fig. 1 is a vertical sectional View through a carburetor embodying my improvements.

Fig. 2 is a horizontal sectional view on line 22 of Fig. 1.

In the drawing above briefly described, the numeral 3 denotes a vertically disposed casing having a dome-like upper end 4 which is provided with an outlet neck 5 for con nection with an intake manifold, the lower portion of said casing being equipped with an air inlet neck 6 having a choke 7 and provided if desired with a suction-controlled valve (not shown).

Rigidly mounted in the central vertical portion of the casing 3, is a fuel spray nozzle 8 which may be provided with an appropriate needle valve 9, and fuel is fed to said nozzle by a conventional float chamber 10. Surrounding this nozzle 8 in spaced relation therewith is a vertical tube 11 having openings 12 in its lower portion to admit air from the easing into the space between said tube 11 and said nozzle 8, so that the upwardly drawn air will pick up fuel from the nozzle.

Tube 11 projects above the nozzle 8 and the portion of this tube around the upper portion of said nozzle, as well as a portion of said tube projecting above said nozzle, are surrounded by heating means. This means is preferably in the form of a jacket or auxiliary casing 13 provided with an inlet 14 for a heating medium such as exhaust gas, or water fromithe engine jacket, and with an outlet 15 for the heating medium. Heat conducting vanes 16 are preferably provided on the tube 11 within the jacket or casing 13.

A second and rotatable tube 17'is disposed in the casing 3 in vertical alinement with the tube 11 and has its lower end telescoped with the upper end of said tube 11, the two tubes being in open communication. Tube 17 is preferably provided with a central tubular portion 18' integral with the upper end of this tube and spaced inwardly from the wall of the latter, said tubular portion.18 receiving a fixed vertical stem 19 which is suitably secured to a spider or the like 20 at the lower end of the neck 5. The lower end of the portion 18 is closed and the lower end of the stem 19 is pointed, providing an anti-friction bearing 21 holding the tube '17 against ascent, descent of said tube being prevented by an appropriate outstanding flange 22 on the tube 11. Tube 17 is provided with radiating arnis 23 of hollow forin and in communica-' tion with the interior of said tube, said arms having discharge openings 24: for the fuel vapor and air entering the tube 17 from the tube 11. The tube 17 is also provided with a helical vane or the like 25 which is acted upon by the main air current through the carburetor for the purpose of rapidly rotating the tube 17 and its arms 23. Thus, in-

cident to such rotation, the fuel vapor is whirled as it is discharged from the openings 24' and consequently it is thrown outwardly'by centrifugal force. It will be observed from the drawing, that this fuel whirling and discharging means is disposed within the dome-like upper end 4 of the easing 3. Consequently, the fuel will be by centrifugal force, thrown against said domelike upper end. Provision is made for heating this end 4, and consequently the fuel and the air mixed with it, will be again heated. before discharge from the carburetor and passage to the engine cylinders.

Preferably, the heating means for the dome or the like 41, consists of a jacket 26 around the same, said jacket having an inlet 27 and an outlet 28 for conducting a heating medium such as exhaust gases or water from the engine jacket, to and from said jacket 26.

By the construction described, air entering the tube 11 through the openings 12 and rising in said tube 11, will be heated by the heating means'13 around said tube. Also, the upper portion of the tube 11 which confines the spray of fuel from the nozzle 8, is heated by said heating means 13 so that not only the air but the sprayed fuel also, are heated as they ascend. Then, as this mixture of air and fuel vapor is whirled and thrown out by centrifugal force from the arms 23, through their perforations 24, the mixture strikes the dome-like upper end 4 of the casing 3 and is consequently further heated and gasified, insuring much better re sults than with the ordinary carburetor, particularly in cold weather.

Preferably, the interior diameter of the casing 3 is chocked somewhat above the heating means 13, by the provision of an inwardly projecting annular flange 29. This causes the upgoing air around said heating means 13 to pass inwardly over the latter so that maximum air-heating by said means 13, may be accomplished. Directly above the choking means or flange 29, the casing is preferably enlarged somewhat in diameter, as denoted at 30, and this enlargement underlies the lower end of the heating space between the jacket 26 and the dome or the like 4, so that here again air may contact with maximum heating surface to effectively heat said air, insuring much better results than could otherwise be obtained.

Suitable provision may be made for lubricating the contacting surfaces of the stem 19 and the tubular portion 18. For this purpose, an oil conducting tube 31 is shown a passing through the neck 5, leading to an appropriate point, and provided at its outer end with a funnel or the like 32 into which oil may be supplied with an ordinary oil can. As excellent results are obtainable from the general construction shown and described, such construction is preferably followed. However, within the scope of the invention as claimed, numerous variations may be made.

,I claim:

1.' In a carburetor, a vertically disposed casing having an outlet at its upper end and air inlet means at its lower end, a vertical tube mounted rigidly in the lower portion of said casing and itself having an air inlet, a fuel nozzle within said tube and spaced from the wall thereof, means around said tube within the casing for heating the tube and the air passing around the heating means, a rotatable fuel and air-receiving device in the upper portion of the casing positioned to receive the fuel and air mixture from said tube, said rotatable device being provided with an outlet for the mixture to discharge the same against the upper portion of the casing wall, and means for heating said portion of said casing'wall, said device embodying pitched means acted on by the draught of air through the carburetor for rotating said device.

2. A structure as specified in claiml; said casing being internally contracted immediately above the first named heating means and expanded immediately below the second named heating means.

3. A carburetor comprising a vertically elongated casing having a dome-like upper end provided with an outlet neck, the lower portion of said casing having air inlet means, a vertical tube mounted rigidly in the lower portion of the casing and itself having an air inlet, a fuel nozzle disposed within said tube and spaced from the wall of the latter, an auxiliary casing within the first named casing and spaced from the wall of the latter, said auxiliary casing surrounding said tube and having an inlet and an outlet for a heatingmedium, an upper tube having its lower end telescoped with the upper end of the first named tube, means rotatably mounting said upper tube, tubular arms projecting from and communieating with said upper tube, said arms having fuel discharge perforations for centrifugally delivering fuel against said dome-like upper end of the casing, means surrounding said dome-like casing end for heating the same, and pitched means on said upper tube acted upon by passage of air through the casin or rotating said tube and its arms.

4. 3 structure as specified in claim 3; the first named casing being internally contracted immediately above said auxiliary casing and increased in internal diameter at the lower extremity of said dome-like upper end.

5. In a carburetor, an air conducting casing having an upstanding tube formed with an air inlet, a fuel nozzle disposed in said tube and spaced from the wall thereof, an auxiliary casing surrounding said tube and spaced from the wall of the first named casing, and means for conducting a heating medium to and from said auxiliary casing.

6. In a carburetor, a vertically disposed air conducting casing'having an outlet neck at its upper end and inlet means at its lower portion, a tube mounted rigidly in the lower portion of the casing and itself having an air inlet, a fuel nozzle disposed in said tube and spaced from the wall thereof, an upper tube whose lower end is telescoped with the upper end of the first named tube, said uppertube being provided with radiating fuel spraying arms and having a central tubular portion, said central tubular portion being closed at its lower end but open at its upper end, a stem disposed vertically and fixedly mounted in the casing, said stem being received in said tubular portion to rotatably mount the upper tube and its arms, the lower end of said stem being in contact with p acted upon by air passing through the-carburetor, to rapidly rotate said tube and its arms.

In testimony whereof I have hereunto affixed my signature.

MOYLE SPENCER SKAER. 

